Glass is made of the mixture of:
A). Quartz and mica
B). Sand and silicates
C). Salt and quartz
D). Sand and salt
Deep blue colour is imparted to glass by the presence of
A). Cupric oxide
B). Nickel oxide
C). Cobalt oxide
D). Iron oxide
In vulcanisation, natural rubber is heated with
A). Carbon
B). Silicon
C). Sulphur
D). Phosphorous
How does common salt help in separating soap from the solution after saponification?
A). By decreasing density of Soap
B). By decreasing solubility of Soap
C). By increasing density of Soap
D). By increasing solubility of Soap
What are the soaps?
A). Salts of silicates
B). Mixture of glycerol and alcohols
C). Sodium or potassium salts of heavier fatty acids
D). Esters of heavy fatty acids